Experimental and numerical analyses of multi-DBD plasma actuators to reduce wind loads and modify local flow on the roofs of low-rise buildings
The present study experimentally and numerically investigates the feasibility of applying multiple dielectric barrier discharge (multi-DBD) plasma actuators to reduce wind loads and modify local flow field on the roofs of low-rise buildings. Four arrangements of multi-DBD plasma actuators are placed...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2018-09-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/1.5048686 |
| _version_ | 1830487607132291072 |
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| author | Xuewen Zhang Zhengnong Li Chequan Wang Jiaxing Hu Lifen Zhou |
| author_facet | Xuewen Zhang Zhengnong Li Chequan Wang Jiaxing Hu Lifen Zhou |
| author_sort | Xuewen Zhang |
| collection | DOAJ |
| description | The present study experimentally and numerically investigates the feasibility of applying multiple dielectric barrier discharge (multi-DBD) plasma actuators to reduce wind loads and modify local flow field on the roofs of low-rise buildings. Four arrangements of multi-DBD plasma actuators are placed on the roofs and induce four directions of wall jets. The results show that mean and peak negative pressure coefficients are negative no matter the plasma actuation is on or off. These wall jets decrease the absolute values of these pressure coefficients in different roof regions and succeed in modifying the local flow around the roof. The wall jet blowing from the trailing edge to the leading edge has the best effect on wind loads, since the absolute values of mean and peak negative pressure coefficients are respectively reduced by about 20% and 12% near the leading edge. The different variations of wind loads and the local flow for all arrangements are due to the compact of the directionality of the wall jets. The wall jet produces a strong suction region at the beginning of the wall jet, which leads to an obvious enhancement of wind loads in this region. Meanwhile, the wall jet induces a strong pressure region at the back of the wall jet, resulting in an apparent decline of wind loads. |
| first_indexed | 2024-12-21T19:04:26Z |
| format | Article |
| id | doaj.art-02f64146b61743a393386ed4191dc08d |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-12-21T19:04:26Z |
| publishDate | 2018-09-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-02f64146b61743a393386ed4191dc08d2022-12-21T18:53:23ZengAIP Publishing LLCAIP Advances2158-32262018-09-0189095314095314-1910.1063/1.5048686055809ADVExperimental and numerical analyses of multi-DBD plasma actuators to reduce wind loads and modify local flow on the roofs of low-rise buildingsXuewen Zhang0Zhengnong Li1Chequan Wang2Jiaxing Hu3Lifen Zhou4Key Laboratory of Building Safety and Efficiency of the Ministry of Education, Hunan University, Changsha, Hunan 410082, ChinaKey Laboratory of Building Safety and Efficiency of the Ministry of Education, Hunan University, Changsha, Hunan 410082, ChinaKey Laboratory of Building Safety and Efficiency of the Ministry of Education, Hunan University, Changsha, Hunan 410082, ChinaKey Laboratory of Building Safety and Efficiency of the Ministry of Education, Hunan University, Changsha, Hunan 410082, ChinaKey Laboratory of Building Safety and Efficiency of the Ministry of Education, Hunan University, Changsha, Hunan 410082, ChinaThe present study experimentally and numerically investigates the feasibility of applying multiple dielectric barrier discharge (multi-DBD) plasma actuators to reduce wind loads and modify local flow field on the roofs of low-rise buildings. Four arrangements of multi-DBD plasma actuators are placed on the roofs and induce four directions of wall jets. The results show that mean and peak negative pressure coefficients are negative no matter the plasma actuation is on or off. These wall jets decrease the absolute values of these pressure coefficients in different roof regions and succeed in modifying the local flow around the roof. The wall jet blowing from the trailing edge to the leading edge has the best effect on wind loads, since the absolute values of mean and peak negative pressure coefficients are respectively reduced by about 20% and 12% near the leading edge. The different variations of wind loads and the local flow for all arrangements are due to the compact of the directionality of the wall jets. The wall jet produces a strong suction region at the beginning of the wall jet, which leads to an obvious enhancement of wind loads in this region. Meanwhile, the wall jet induces a strong pressure region at the back of the wall jet, resulting in an apparent decline of wind loads.http://dx.doi.org/10.1063/1.5048686 |
| spellingShingle | Xuewen Zhang Zhengnong Li Chequan Wang Jiaxing Hu Lifen Zhou Experimental and numerical analyses of multi-DBD plasma actuators to reduce wind loads and modify local flow on the roofs of low-rise buildings AIP Advances |
| title | Experimental and numerical analyses of multi-DBD plasma actuators to reduce wind loads and modify local flow on the roofs of low-rise buildings |
| title_full | Experimental and numerical analyses of multi-DBD plasma actuators to reduce wind loads and modify local flow on the roofs of low-rise buildings |
| title_fullStr | Experimental and numerical analyses of multi-DBD plasma actuators to reduce wind loads and modify local flow on the roofs of low-rise buildings |
| title_full_unstemmed | Experimental and numerical analyses of multi-DBD plasma actuators to reduce wind loads and modify local flow on the roofs of low-rise buildings |
| title_short | Experimental and numerical analyses of multi-DBD plasma actuators to reduce wind loads and modify local flow on the roofs of low-rise buildings |
| title_sort | experimental and numerical analyses of multi dbd plasma actuators to reduce wind loads and modify local flow on the roofs of low rise buildings |
| url | http://dx.doi.org/10.1063/1.5048686 |
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